General Algebraic Modeling System
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The General Algebraic Modeling System (GAMS) is a high-level modeling system for mathematical programming problems. The program itself consists of a language compiler, an integrated development environment, and a group of integrated solvers. Thus, GAMS is not a solver itself.
GAMS is designed for ease of use. It also focuses on allowing developers to separate model definition from model data. It is produced by GAMS Development Corporation.